uint8 NORMAL_DISTANCE=0
uint8 NO_OBSTACLE=1
uint8 LESS_THAN_MINIMUM_DISTANCE=2
uint8 ERROR=3

uint8 ultrasonic_status_1
int32 ultrasonic_data_1
uint8 ultrasonic_status_2
int32 ultrasonic_data_2
uint8 ultrasonic_status_3
int32 ultrasonic_data_3
uint8 ultrasonic_status_4
int32 ultrasonic_data_4
uint8 ultrasonic_status_5
int32 ultrasonic_data_5
uint8 ultrasonic_status_6
int32 ultrasonic_data_6
uint8 ultrasonic_status_7
int32 ultrasonic_data_7
uint8 ultrasonic_status_8
int32 ultrasonic_data_8